Ring for coupling camera to endoscope



FIG. 1 is a top and right front perspective view of a ring for coupling camera to endoscope showing my new design;

FIG. 2 is a top and left rear perspective view thereof;

FIG. 3 is a right side elevational view thereof;

FIG. 4 is a front elevational view thereof;

FIG. 5 is a rear elevational view thereof;

FIG. 6 is a top plan view thereof;

FIG. 7 is a left side elevational view thereof;

FIG. 8 is a bottom plan view thereof. 

The ornamental design for a ring for coupling camera to endoscope, substantially as shown. 